280655431 has 16 divisors (see below), whose sum is σ = 350576640. Its totient is φ = 219104640.

The previous prime is 280655413. The next prime is 280655443. The reversal of 280655431 is 134556082.

It is a cyclic number.

It is not a de Polignac number, because 280655431 - 2¹⁹ = 280131143 is a prime.

It is a super-2 number, since 2×280655431² = 157534941899591522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280655411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34351 + ... + 41728.

It is an arithmetic number, because the mean of its divisors is an integer number (21911040).

Almost surely, 2^280655431 is an apocalyptic number.

280655431 is a deficient number, since it is larger than the sum of its proper divisors (69921209).

280655431 is a wasteful number, since it uses less digits than its factorization.

280655431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76134.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 280655431 is about 16752.7738300259. The cubic root of 280655431 is about 654.7233305039.

The spelling of 280655431 in words is "two hundred eighty million, six hundred fifty-five thousand, four hundred thirty-one".